@charset "UTF-8";
@import "https://fonts.googleapis.com/earlyaccess/notosansjp.css";
html,
body {
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}
html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-block-start: 56px;
}
body {
  padding: 56px 0 0;
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  position: absolute;
  width: 100%;
}
h1, h2, h3, h4, h5, h6, p {
  margin: 0;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
a {
  color: var(--color-primary);
}
button {
  padding-right: 0;
  padding-left: 0;
  font-family: "Noto Sans JP", sans-serif;
  font-size: inherit;
  background: none;
  border: none;
}
ul,
ol {
  padding-right: 0;
  padding-left: 0;
  list-style: none;
}
img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}
:root {
  --color-white: #fff;
  --color-primary: #000947;
  --color-blue-01: #DEEFF5;
  --color-blue-02: #29BFE4;
  --color-blue-03: #170BCA;
  --color-yellow-01: #FFFDE3;
  --color-yellow-02: #FDE201;
  --color-yellow-03: #E6CD02;
  --color-red-01: #CC0000;
  --color-gray-01: #EEEEEE;
}
.only-sp {
  display: block;
}
.only-pc {
  display: none;
}
.is-hidden {
  display: none !important;
}

/* ヘッダー
--------------------------------------------------------------- */
.ot-header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 999;
  background: var(--color-white);
  box-shadow: 0px 3px 6px 0px rgba(0, 0, 0, 0.16);
}
.ot-header__logo {
  width: 162px;
  margin-bottom: 6px;
}
.ot-header__sp-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 56px;
  padding-left: 15px;
}
.ot-header__sp-control {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.ot-header__donate {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  position: relative;
  display: flex;
  justify-content: center;
  width: 100px;
  height: 30px;
  font-size: 10px;
  font-weight: bold;
  cursor: pointer;
  border-radius: 8px;
}
.ot-header__donate::before {
  content: "";
  position: absolute;
  right: 4px;
  display: inline-block;
  width: 1.6em;
  height: 1.6em;
  vertical-align: middle;
  background-color: var(--color-primary);
  -webkit-mask-image: url("../img/svg-icons/caret-right.svg");
  mask-image: url("../img/svg-icons/caret-right.svg");
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.ot-header__open {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 56px;
  margin-left: 10px;
  cursor: pointer;
  background: var(--color-gray-01);
}
.ot-header__open-icon,
.ot-header-menu__close-btn {
  width: 21px;
  vertical-align: middle;
}
.ot-header-menu__close {
  width: 60px;
  height: 56px;
}
.ot-header-menu__donate {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  position: relative;
  display: flex;
  justify-content: center;
  font-weight: bold;
}
.ot-header-menu__donate::before {
  content: "";
  position: absolute;
  right: 30px;
  display: inline-block;
  width: 1.6em;
  height: 1.6em;
  vertical-align: middle;
  background-color: var(--color-primary);
  -webkit-mask-image: url("../img/svg-icons/caret-right.svg");
  mask-image: url("../img/svg-icons/caret-right.svg");
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.ot-header-donate {
  background: var(--color-yellow-02);
  border-radius: 8px;
}
.ot-header-donate__text {
  position: relative;
  left: -8px;
}
.ot-header-donate:hover {
  background: var(--color-yellow-03);
}

/* 汎用レイアウト
--------------------------------------------------------------- */
.ot-main-section{
  padding-bottom: 50px;
  background: url("../img/feature-deco_sp.png") center bottom repeat-x;
}
.ot-section-layout {
  position: relative;
  margin: 0;
  padding-block: 20px 80px;
}
.ot-content-layout {
  position: relative;
  width: 100%;
  max-width: 1140px;
  margin-inline: auto;
  padding-inline: 15px;
}
/* h2 */
.ot-content-heading {
  margin: 14px auto 20px;
  font-size: 1.25rem;
  font-weight: bold;
  text-align: center;
  line-height: 1.5;
}
/* h3 */
.ot-content-detail-heading {
  font-size: 1.8rem;
  font-weight: bold;
  text-align: center;
  line-height: 1.5;
}
.ot-content-text {
  font-size: 1rem;
  text-align: center;
}
/* 404 */
.ot-section-layout--404 {
  padding-bottom: 60px;
}
.ot-404__button {
  max-width: 260px;
  margin-top: 50px;
  margin-inline: auto;
}
/* 下層ページ*/
.ot-section-layout--main {
  padding-bottom: 0;
  text-align: center;
}
.ot-main__heading {
  font-size: 1.5rem;
}
.ot-main__text {
  margin-top: 20px;
  font-size: 0.875rem;
}
/* CTAボタン */
.ot-cta {
  padding-block: 24px 30px;
  padding-inline: 20px;
  border-radius: 10px;
  background-color: var(--color-blue-01);
}
.ot-cta__heading {
  margin-bottom: 30px;
  font-size: 1.6875rem;
  text-align: center;
}
.ot-cta__text {
  max-width: 920px;
  margin: auto;
  font-size: 1.125rem;
  font-weight: 700;
}
.ot-cta__button {
  max-width: 300px;
  margin-inline: auto;
  margin-top: 40px;
}
/* ボタン汎用 */
.ot-button {
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 12px 36px;
  color: var(--color-primary);
  text-decoration: none;
  border-radius: 8px;
  background-color: var(--color-yellow-02);
}
.ot-button__text {
  width: 100%;
  padding-inline: 24px 12px;
  font-size: 1.125rem;
  font-weight: bold;
  text-align: center;
}
.ot-button__icon:not(:root) {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background-color: var(--color-primary);
}
/* さらに表示するボタン */
.ot-more-button {
  max-width: 300px;
  margin: auto;
  border: 1px solid var(--color-primary);
  background: var(--color-white);
}
/* アイコン */
.ot-icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: middle;
  background-color: var(--color-primary);
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.ot-icon--caret-right {
  -webkit-mask-image: url("../img/svg-icons/caret-right.svg");
  mask-image: url("../img/svg-icons/caret-right.svg");
}
.ot-icon--plus {
  -webkit-mask-image: url("../img/svg-icons/plus.svg");
  mask-image: url("../img/svg-icons/plus.svg");
}
.ot-icon--minus {
  -webkit-mask-image: url("../img/svg-icons/minus.svg");
  mask-image: url("../img/svg-icons/minus.svg");
}
/* バルーン */
.ot-section-layout--baloon {
  position: relative;
  overflow: hidden;
}
.ot-section-layout--baloon::after {
  content: "";
  position: absolute;
  bottom: 0px;
  width: 120%;
  left: -10%;
  height: 150px;
  clip-path: ellipse(45% 40% at 50% 100%);
  background: var(--color-white);
}

/* 大田区について
--------------------------------------------------------------- */
.ot-feature {
  width: 100%;
  aspect-ratio: 375/230;
  padding-block: 8% 12%;
  padding-inline: 32px;
  color: var(--color-white);
  background: url("../img/feature-bg.jpg") center center no-repeat;
  background-size: cover;
  position: relative;
  text-shadow: 2px 1px #333;
}
.ot-feature::before {
  display: block;
  content: '';
  background-color: rgba(0, 0, 0, 0.14);
  position: absolute;
  left: 0;
  top: 0;
  width :100%;
  height: 100%;
}
.ot-feature__heading,
.ot-feature__description {
  position: relative;
  z-index: 0;
}
.ot-feature__heading {
  margin: 0;
  font-size: 1.25rem;
  text-align: center;
}
.ot-feature__description {
  max-width: 1110px;
  margin: 30px auto 0;
  font-size: 0.875rem;
  text-align: left;
}

/* トップへ戻るボタン
--------------------------------------------------------------- */
.ot-pagetop {
  position: sticky;
  bottom: 50px;
  width: 100%;
  margin: 0;
  z-index: 10;
  transition: all 0.3s;
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
}
.show-pagetop .ot-pagetop {
  pointer-events: auto;
  visibility: visible;
  opacity: 1;
}
.ot-pagetop__link {
  position: absolute;
  top: -25px;
  right: 23px;
  display: block;
  width: 50px;
  border-radius: 50%;
  box-shadow: 0px 3px 6px 0px rgba(0, 0, 0, 0.16);
}
.ot-pagetop__icon {
  width: 100%;
}

/* フッター
--------------------------------------------------------------- */
.ot-footer {
  position: relative;
  padding: 50px 30px;
  color: var(--color-white);
  text-align: center;
  background: var(--color-blue-02);
}
.ot-footer a {
  color: var(--color-white);
}
.ot-footer__inner {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
}
.ot-footer__logo {
  display: inline-block;
  width: 114px;
  margin-bottom: 36px;
}
.ot-footer__title {
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: bold;
}
.ot-footer__subtitle {
  font-size: 0.875rem;
  font-weight: bold;
}
.ot-footer__info {
  margin: auto;
  font-size: 1rem;
  text-align: left;
}
.ot-footer__info dt {
  width: 100%;
  margin-top: 40px;
}
.ot-footer__info dd {
  display: flex;
  flex-direction: column;
  margin: 0;
}
.ot-footer__files {
  margin: 14px auto;
  text-align: left;
  font-weight: bold;
  line-height: 2.8;
}
.ot-footer__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  margin-top: 35px;
  font-size: 0.75rem;
}

@media (min-width: 768px) {
  html {
    scroll-padding-block-start: 70px;
  }
  body {
    padding-top: 70px;
  }
  .only-sp {
    display: none;
  }
  .only-pc {
    display: block;
  }

  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__inner {
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
  }
  .ot-header__sp-nav {
    height: 70px;
  }
  .ot-header__open,
  .ot-header__close,
  .ot-header-menu__close {
    width: 70px;
    height: 70px;
  }
  .ot-header__open-icon,
  .ot-header-menu__close-btn {
    width: 30px;
  }
  .ot-header__logo {
    width: 400px;
    margin-bottom: 0;
    margin-left: 10px;
  }
  .ot-header__logo:hover {
    opacity: 0.8;
  }
  .ot-header__donate {
    width: 174px;
    height: 38px;
    font-size: 14px;
  }
  .ot-header-donate__text {
    position: relative;
    top: -1px;
    left: -14px;
  }
  .ot-header__open {
    display: block;
    margin-left: 20px;
  }
  .ot-header__open-icon {
    display: block;
    margin: auto;
  }

  /* 汎用レイアウト
  --------------------------------------------------------------- */
  .ot-main-section {
    background-image: url(../img/feature-deco_pc.png);
    padding-bottom: 180px;
  }
  .ot-section-layout {
    padding-block: 70px 80px;
  }
  /* h2 */
  .ot-content-heading {
    margin: 20px auto 40px;
    font-size: 2.375rem;
    line-height: 1.5;
  }
  .ot-content-text {
    font-size: 1.125rem;
  }
  /* 404 */
  .ot-404__button {
    max-width: 300px;
    margin-inline: auto;
    margin-top: 80px;
  }
  /* 下層ページタイトル */
  .ot-section-layout--main {
    padding-bottom: 0;
  }
  .ot-main__heading {
    font-size: 2.75rem;
  }
  .ot-main__text {
    font-size: 1rem;
  }
  /* CTAボタン */
  .ot-cta {
    padding-block: 80px;
    padding-inline: 20px;
  }
  .ot-cta__heading {
    font-size: 2.375rem;
  }
  .ot-cta__button {
    margin-top: 40px;
  }
  .ot-cta__text {
    text-align: center;
    font-size: 1.125rem;
    letter-spacing: 0.05em;
  }
  /* 詳しくはこちらボタン */
  .ot-button:hover  {
    background: var(--color-yellow-03);
  }
  /* さらに表示するボタン */
  .ot-more-button:hover  {
    background: var(--color-blue-01);
  }
  /* バルーン */
  .ot-section-layout--baloon::after {
    height: 280px;
  }

  /* 大田区とは
  --------------------------------------------------------------- */
  .ot-feature {
    padding-block: 7% 7%;
    aspect-ratio: 1920/505;
  }
  .ot-feature__description {
    text-align: center;
  }
  .ot-feature__heading {
    font-size: 2rem;
  }
  .ot-feature__description {
    font-size: 1.125rem;
    text-align: center;
  }

  /* トップへ戻るボタン
  --------------------------------------------------------------- */
  .ot-pagetop {
    bottom: 80px;
  }
  .ot-pagetop__link {
    width: 84px;
    top: -42px;
    right: 70px;
  }

  /* フッター
  --------------------------------------------------------------- */
  .ot-footer__inner {
    display: flex;
    align-items: flex-start;
    gap: 116px;
    max-width: 1110px;
    padding-top: 60px;
    padding-bottom: 24px;
  }
  .ot-footer__logo {
    display: inline-block;
    width: 194px;
    margin-bottom: 0;
  }
  .ot-footer__description {
    text-align: left;
  }
  .ot-footer__title {
    font-size: 1.5rem;
  }
  .ot-footer__subtitle {
    font-size: 1.125rem;
  }
  .ot-footer__info {
    display: grid;
    grid-template-columns: 5.8em 1fr;
    column-gap: 1px;
    margin: 40px auto 50px;
    line-height: 2.4;
  }
  .ot-footer__info dt {
    margin-top:0;
  }
  .ot-footer__files {
    position: relative;
    display: grid;
    grid-template-columns: 7em 1fr;
    -moz-column-gap: 1px;
    column-gap: 1px;
  }
  .ot-footer__copy {
    margin-top: 64px;
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  html {
    scroll-padding-block-start: 80px;
  }
  body {
    padding-top: 80px;
  }
  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
  }
  .ot-header__logo {
    width: 260px;
    margin-left: 0;
  }
  .ot-header__sp-nav {
    width: auto;
    height: 80px;
    padding-left: 0;
  }
  .ot-header__nav {
    position: relative;
    display: flex;
    align-items: center;
  }
  .ot-header__sp-control {
    display: none;
  }
  .ot-header-menu__donate {
    width: 124px;
    height: 36px;
    margin-left: 15px;
    font-size: 0.875rem;
  }
  .ot-header-menu__donate::before {
    right: 2px;
    width: 1.4em;
    height: 1.4em;
  }
  .ot-header-donate__text {
    left: -6px;
  }
  .ot-header-menu__close {
    display: none;
  }
  .ot-header-menu__list {
    display: flex;
    gap: 10px;
    margin: 0;
  }
  .ot-header-menu__item:first-of-type {
    display: none;
  }
  .ot-header-menu__link {
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
  }
  .ot-header-menu__link.active,
  .ot-header-menu__link:hover {
    border-bottom: 0.2em solid var(--color-yellow-02);
    padding-bottom: 0.2em;
    text-decoration: none;
  }
}

@media (min-width: 1280px) {
  html {
    scroll-padding-block-start: 90px;
  }
  body {
    padding-top: 90px;
  }
  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__inner {
    padding: 0 15px;
  }
  .ot-header__logo {
    width: 360px;
    margin-left: 0;
  }
  .ot-header__sp-nav {
    height: 90px;
  }
  .ot-header-menu__link {
    font-size: 1rem;
  }
  .ot-header-menu__list {
    gap: 20px;
  }
  .ot-header-menu__donate {
    width: 158px;
    height: 48px;
    margin-left: 25px;
    font-size: 1rem;
  }
  .ot-header-menu__donate::before {
    right: 10px;
  }
  .ot-header-donate__text {
    left: -6px;
  }
}

@media (min-width: 1440px) {
  html {
    scroll-padding-block-start: 100px;
  }
  body {
    padding-top: 100px;
  }
  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__logo {
    width: 380px;
  }
  .ot-header__sp-nav {
    height: 100px;
  }
  .ot-header-menu__link {
    font-size: 1.125rem;
  }
  .ot-header-menu__donate {
    width: 218px;
    height: 48px;
    font-size: 1.125rem;
  }
  .ot-header-menu__donate::before {
    right: 30px;
    width: 1.6em;
    height: 1.6em;
  }
  .ot-header-donate__text {
    left: -14px;
  }
}

@media (min-width: 1680px) {
  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__inner {
    padding: 0 40px;
  }
  .ot-header__logo {
    width: 400px;
    margin-left: 10px;
  }
  .ot-header-menu__list {
    gap: 40px;
  }
  .ot-header-menu__donate {
    margin-left: 35px;
  }
}

@media (max-width: 1023.98px) {
  /* ヘッダー
  --------------------------------------------------------------- */
  .ot-header__inner {
    padding: 0 0;
  }
  .ot-header-menu {
    position: absolute;
    top: 0;
    right: -100%;
    z-index: 100;
    display: block;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    padding: 0 30px;
    font-weight: bold;
    background: var(--color-blue-01);
    transition: all 0.2s ease;
    overflow: auto;
  }
  .ot-header-menu__close {
    position: absolute;
    top: 0px;
    right: 0px;
    cursor: pointer;
    background: var(--color-gray-01);
  }
  .ot-header-menu__list {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin: 0;
    margin-top: 120px;
    font-size: 20px;
  }
  .ot-header-menu__donate {
    width: 100%;
    height: 69px;
    margin-top: 70px;
    margin-left: 0;
    margin-bottom: 70px;
    font-size: 20px;
  }
  .ot-header-menu__link {
    display: inline-flex;
    align-items: center;
    width: 100%;
    height: 36px;
    color: var(--color-primary);
    text-decoration: none;
  }
  .ot-header-menu__link::before {
    content: "";
    display: inline-block;
    width: 1.4em;
    height: 1.4em;
    vertical-align: middle;
    background-color: var(--color-primary);
    -webkit-mask-image: url("../img/svg-icons/caret-right.svg");
    mask-image: url("../img/svg-icons/caret-right.svg");
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
  }
  .ot-header-menu__link::before {
    margin-right: 5px;
  }
  .menu-open .ot-header {
    overflow: visible;
  }
  .menu-open .ot-header-menu {
    right: 0;
  }
}

@media (max-width: 767.98px) {
  /* ヘッダー
  --------------------------------------------------------------- */
  .menu-open .ot-header-menu {
    width: 100%;
    max-width: none;
  }
}